Make IVR machine detection an option in channel config

[rowanseymour]

No description provided.

[codecov]

Codecov Report

Merging #484 (8d60f4b) into main (c302d68) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #484      +/-   ##
==========================================
- Coverage   56.85%   56.83%   -0.02%     
==========================================
  Files         123      123              
  Lines        8619     8622       +3     
==========================================
  Hits         4900     4900              
- Misses       2942     2945       +3     
  Partials      777      777              

Impacted Files	Coverage Δ
core/ivr/twiml/twiml.go	18.56% <0.00%> (-0.08%)	⬇️
core/ivr/vonage/vonage.go	20.26% <0.00%> (-0.05%)	⬇️
core/models/channels.go	50.00% <0.00%> (-1.07%)	⬇️

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